1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
//
// Copyright 2012 Ettus Research LLC
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
module gpmc16_to_fifo36
#(
parameter FIFO_SIZE = 9,
//not ready until minimum xfers of space available
parameter MIN_SPACE16 = 128
)
(
//input interface
input gpif_clk, input gpif_rst,
input [15:0] in_data,
input valid,
output reg ready,
//output fifo interface
input fifo_clk, input fifo_rst,
output [35:0] out_data,
output out_src_rdy,
input out_dst_rdy
);
wire [35:0] data_int;
wire src_rdy_int, dst_rdy_int;
wire [18:0] refr_data;
wire refr_src_rdy, refr_dst_rdy;
wire [15:0] fifo_space;
always @(posedge gpif_clk)
ready <= (fifo_space >= MIN_SPACE16/2);
packet_reframer packet_reframer
(.clk(gpif_clk), .reset(gpif_rst), .clear(1'b0),
.data_i(in_data), .src_rdy_i(valid), .dst_rdy_o(),
.data_o(refr_data), .src_rdy_o(refr_src_rdy), .dst_rdy_i(refr_dst_rdy));
fifo19_to_fifo36 #(.LE(1)) f19_to_f36
(.clk(gpif_clk), .reset(gpif_rst), .clear(1'b0),
.f19_datain(refr_data), .f19_src_rdy_i(refr_src_rdy), .f19_dst_rdy_o(refr_dst_rdy),
.f36_dataout(data_int), .f36_src_rdy_o(src_rdy_int), .f36_dst_rdy_i(dst_rdy_int));
fifo_2clock_cascade #(.WIDTH(36), .SIZE(FIFO_SIZE)) fifo_2clk
(.wclk(gpif_clk), .datain(data_int), .src_rdy_i(src_rdy_int), .dst_rdy_o(dst_rdy_int), .space(fifo_space),
.rclk(fifo_clk), .dataout(out_data), .src_rdy_o(out_src_rdy), .dst_rdy_i(out_dst_rdy), .occupied(),
.arst(fifo_rst | gpif_rst));
endmodule //fifo_to_gpmc16
|
